Seiko Cal. 3870 - 837

The 3870-837 is a sought-after Automatic piece from Seiko's golden era. Powered by the 3870 caliber with 34j jewels beating at 36,000 bph, it delivers a 42 hours power reserve. [seikata-wm-23c5d171ca05]

Also known as: Tuna

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

37mm

Case Thickness

11.1mm

Lug Width

19mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

50m

Dial Color

Blue Sunburst

Jewels

34j

Frequency

36,000 bph

Power Reserve

42 hours

Year

1967

Related Models

• Seiko 6668-187
• Seiko 0781-224
• Seiko 6688-245
• Seiko 6218-117
• Seiko 3869-571
• Seiko 7168-667
• Seiko 7140-181
• Seiko 6669-977
• Seiko 3855-880
• Seiko 5645-675
• Seiko 3844-224
• Seiko 7187-340